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IB/hfi1: Add parsing for platform configuration format version 4 

Platform configuration format version 4, that didn't use the file
size field, is not parsed by the host driver. Only version 5 is
supported. Add logic in parsing procedure to determine what format
is being used and allow to read data from version 4 files.

Reviewed-by: Jan Sokolowski <jan.sokolowski@intel.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Andrzej Kacprowski <andrzej.kacprowski@intel.com>
Signed-off-by: Jakub Byczkowski <jakub.byczkowski@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Jakub Byczkowski 2017-10-02 11:04:03 -07:00 committed by Doug Ledford
parent 40837273d0
commit 9773afb97f
1 changed files with 22 additions and 2 deletions
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24
drivers/infiniband/hw/hfi1/firmware.c
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@ -113,6 +113,12 @@ struct css_header {
#define MU_SIZE 8
#define EXPONENT_SIZE 4
/* size of platform configuration partition */
#define MAX_PLATFORM_CONFIG_FILE_SIZE 4096
/* size of file of plaform configuration encoded in format version 4 */
#define PLATFORM_CONFIG_FORMAT_4_FILE_SIZE 528
/* the file itself */
struct firmware_file {
struct css_header css_header;
@ -1774,7 +1780,20 @@ int parse_platform_config(struct hfi1_devdata *dd)
/* Field is file size in DWORDs */
file_length = (*ptr) * 4;
ptr++;
/*
* Length can't be larger than partition size. Assume platform
* config format version 4 is being used. Interpret the file size
* field as header instead by not moving the pointer.
*/
if (file_length > MAX_PLATFORM_CONFIG_FILE_SIZE) {
dd_dev_info(dd,
"%s:File length out of bounds, using alternative format\n",
__func__);
file_length = PLATFORM_CONFIG_FORMAT_4_FILE_SIZE;
} else {
ptr++;
}
if (file_length > dd->platform_config.size) {
dd_dev_info(dd, "%s:File claims to be larger than read size\n",
@ -1789,7 +1808,8 @@ int parse_platform_config(struct hfi1_devdata *dd)
/*
* In both cases where we proceed, using the self-reported file length
* is the safer option
* is the safer option. In case of old format a predefined value is
* being used.
*/
while (ptr < (u32 *)(dd->platform_config.data + file_length)) {
header1 = *ptr;